Anthro week 2 lecture notes

Anthro week 2 lecture notes - appear on a homologous...

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2/16/11 Genes that have alternative expressions (different codes at particular loci) are referred to as alleles .
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2/16/11 Understanding the structure of DNA: the base-pair rule Adenine can only bond with Thymine Guanine can only bond with Cytosine
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2/16/11 Important concepts: Genotype Phenotype
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2/16/11 Phenotypes can be influenced by the “behavior” of alleles Dominant alleles Recessive alleles
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2/16/11 Dominant alleles: Alleles that will always potentially serve as the code for the production of a protein
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2/16/11 Recessive alleles: Alleles that will only potentially serve as a code for the production of a protein if the allele at the same locus on the homologous chromosome is recessive
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2/16/11 The concept of co-dominance When two different alleles, either both dominant or both recessive,
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Unformatted text preview: appear on a homologous chromosome at a particular locus. 2/16/11 An example: Human blood types Type A Type B Type AB Type O (phenotypes ) Possible alleles A (dominant) B (dominant) o (recessive) (Locus on chromosome 9) 2/16/11 Two important concepts: 1. Often a great number of different alleles can be found at a particular locus on a particular chromosome. (Example: Some loci responsible for proteins found in your blood have many different possible alleles) 2/16/11 2. Often a great number of loci containing different alleles are responsible for a trait --- these traits are known as polygenic traits. (Example: The trait (phenotype) of eye color is created by alleles found at two different loci on chromosome 15 and one on chromsome 19)...
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Anthro week 2 lecture notes - appear on a homologous...

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